For more effective cooling in open air shade structures, install Mist Kits. A light spray of water combines with fan action for a gentle, cooling mist. Misting aids in reduction of heat stress which can affect milk production, inhibit livestock weight gain and cause too much water intake. Each nozzle delivers 1/2 gallon at low end of the 50-300 psi pressure range, yielding cooling of up to 25F degrees. 4-nozzle kit is suitable for VS20 & VS24.